<template>
    <div class="tabs">
        <el-tag
            v-for="(item,index) in tags"
            :key="item.path"
            :closable="item.name !== 'home'"
            :effect="$route.name === item.name ? 'dark' : 'plain'"
            @click="changeMenu(item)"
            @close="handleClose(item,index)"
            size="small"
            >
            {{ item.label }}
        </el-tag>
    </div>
</template>

<script>
import {mapState,mapMutations} from 'vuex'
export default {
    name:'CommonTag',
    data(){
        return{

        }
    },
    computed:{
        ...mapState({
            tags:state => state.tab.tabsList
        })
    },
    methods: {
        ...mapMutations(['closeTag']),
        // 点击tag跳转的功能
        changeMenu(item){
            console.log(item)
            this.$router.push({name:item.name})
        },
        // 点击删除 tag 的功能
        handleClose(item,index){
            // 调用store中的mutation
            this.closeTag(item)
            const length = this.tags.length
            // 删除之后的跳转逻辑
            if(item.name !== this.$route.name){
                return
            }
            // 表示删除最后一页
            if(index === length){
                this.$router.push({
                    name:this.tags[index - 1].name
                })
            }else{
                this.$router.push({
                    name:this.tags[index].name
                })
            }
        }
    },
}
</script>

<style lang="less" scoped>
.tabs{
    padding: 20px;
    .el-tag{
        margin-right: 15px;
        cursor: pointer;
    }
}
</style>